变密度和厚度可根据不同的气候。
Variable density and thickness according to different climates.
采用有限元法与变密度法，给出了优化方法和步骤。
The finite element analysis (FEA) and the variable density methods were used. The optimization method and process were presented.
该结论为完井优化中的变密度射孔研究奠定了基础。
This conclusion lays a foundation for the research to variable density perforation in well completion optimization.
此装置采用单片机控制光学变密度盘，浮点放大器技术。
It is applied that optic variable density disk which controlled by microcomputer and floating point amplifier technology in this device.
将变密度拓扑优化方法应用于发动机气缸体轻量化设计中。
A variable density based topology optimization method was applied to the light-weight design of engine block.
变密度（VDL）胶结指数虽有定量评价标准，但是仅供参考；
Though VDL cementing index has quantitative evaluation standard, it is only a reference.
介绍了大庆油田声波变密度测井的现状、应用的技术和仪器的水平。
The status for acoustic variable density log in Daqing Oilfield is introduced including applied techniques and logging tool levels.
本文给出了重力异常的变密度层间改正、变密度地形改正计算公式。
This paper has given the computed formulae of Bouguer plate correction and terrain correction with varying density.
采用双凝固井、变密度固井方式，均采用地面和地下两级安全阀控制；
A cementing method of separable setting and variable density is used, with two level controls of safety valve on the ground and downhole;
阐述了声波变密度测井时对其进行测前、测后线性刻度及记录时差曲线的必要性。
It is necessary to record the linear scale before and after log and the time difference curve in the acoustic variable density log.
由于空间恶劣环境影响，不适宜采用变密度盘调光，而采用可靠性高的可变光阑。
It is not suitable to dodge with the variable density plate in consideration of the rigour environment in space while adopt the adjustable Iris diaphragm with high reliability.
SFB98D变密度测井仪是通过测量全波列来衡量套管井固井质量的一种仪器。
The transform density logging instrument of type SFB98D is used to measure the quality of solidity well with full wave series.
摘要阐述了声波变密度测井时对其进行测前、测后线性刻度及记录时差曲线的必要性。
It is necessary to record the linear scale before and after log and the time difference curve in the acoustic variable density log.
变密度剖面显示技术能够直观地反映界面形态变化，但不如变面积显示的剖面反射层次清晰。
Although variable density also gives an intuitive interface to reflect changes of geometry, yet it is not as clearly as variable area in stratification.
在支配方程推导及求解过程中，采用了霜层变密度分析并引入了据试验数据拟合的传质系数。
The equations feature variable frost density. Meanwhile mass transfer coefficients used in prediction are derived from the published experiment data, which used to be based on Lewis analogy.
结合弹簧模型、变密度法和拓扑优化工具，研究了实现平面可控轨迹输出柔顺机构的设计方法。
This paper described the use of spring model, penalized density method and topology optimization as a synthesis tool for the design of controllable path-generating compliant mechanisms.
又对于变密度、变比热、变导热系数这样的更一般的情况也推立了六个二阶热传导的微分方程。
By the way, for the case of variable density, specific heat as well as thermal conductivity, we have been successful to deduce other similar six heat transfer differential equations.
沉积岩的密度是随深度而变化的，用重力资料研究盆地及其内部构造时必须考虑变密度的情况。
The density of sedimentary rock varies with depth. Density variation must be considered in researching sedimentary basin and its internal geologic structure with the use of gravimetric data.
根据模型分解的思想，采用变密度多层地壳密度模型，据此推导了相应的重力异常正演计算公式。
The variable density multilayered crustal model is put forward according to the idea of model decompose in this paper, and the corresponding gravity forward formula is deduced.
根据胜利油田典型地质模型的构造特点，本文提出了变密度声波方程交错网格高阶差分正演方法。
According to structural feature of typical geologic models in Shengli oilfield, the paper presented staggering mesh high-order difference forward simulation of density-variated acoustic equation.
实验结果表明：变密度烧蚀材料的力学性能随密度的升高而提高，隔热性能随密度的降低而提高；
The experimental results show that the mechanical properties increase with the increase of the density, whereas the isothermal property decreases;
用模拟的变密度波形图显示了裂缝反射波的许多特点，这些特点是正确地识别和处理反射波的重要根据；
The simulated variable density log map shows many important features of reflected waves, which are the base for identification of the reflected wave.
基于此种实验研究框架，本文对轴对称自由剪切流、变密度轴对称射流以及圆柱尾迹进行了一定的研究。
The dynamics of axisymmetric free shear flows, axisymmetric variable-density jets and wakes of cylinders have been studied, to a certain extent, under this framework.
文章应用有限元分析软件ANSYS。采用变密度法建立拓扑优化模型，对抽油机驴头进行拓扑优化设计。
By variable density method, an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit.
通过常密度模型、变密度模型及地震反演得到的莫霍面的比较，证实变密度模型更适合于莫霍面结构的反演。
The variable density model is more suitable for inversion of Moho depths structures than constant density model by comparison of Moho depth from seismic inversion.
采用修正摄动法研究了变密度环形薄膜的轴对称横向固有振动，并求得了确定其横向振动固有频率的特征方程。
In the paper, a perturbation solution analysis for axisymmetric transversal intrinsic vibrations of annular membranes with varying density is presented.
基于变密度拓扑优化方法和声-结构耦合系统有限元模型，对四角固支箱体模拟的飞机座舱进行了减振降噪分析。
The structural topology optimization method—variable density method is used to optimize the topology of an acoustic_box for interior sound pressure reduction.
为了探讨变密度法中伪密度的变化对材料刚度的影响，并建立两者之间的力学关系，本文采用有限元法研究这一问题。
In order to explore the change of pseudo-density to the effect of material rigidity and set up the relation between them for density variable method, we presented FEM to deal with the problem.
为了探讨变密度法中伪密度的变化对材料刚度的影响，并建立两者之间的力学关系，本文采用有限元法研究这一问题。
In order to explore the change of pseudo-density to the effect of material rigidity and set up the relation between them for density variable method, we presented FEM to deal with the problem.
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